Note regarding California compliance: California state calls for a minimum 3-foot dimension on truncated dome pads, and specifies the color of paving tiles be yellow. Other states and the federal government do not have these requirements. We strongly advise consulting with your local access compliance agency before purchasing any ADA signs or products. We have included a great deal of product description and information that can be easily forwarded by email for your inspector's review and approval before you place an order.

Truncated domes are pads of textured ground surface indicators. ADA Sign Depot offers an assortment of sizes for dome pads. This gives our customers more options for most efficiently covering large and smaller areas, as needed. Tactile pads are used on ramps or stairs, in curb cutouts and along paths of travel. Paving tiles are useful in assisting pedestrians who are blind or have visual impairment, warning them of changes in surface level or when about to enter vehicular traffic. But these "bump pads" as many people call them also warn the sighted, alerting them to pay attention to changes in the surface, such as potentially dangerous areas beside train platforms, or pedestrian sidewalks that are on the same level as street traffic.

Truncated domes are "an Americans with Disabilities Act (ADA) requirement in the current Americans with Disabilities Act Accessibility Guidelines (ADAAG) for the use of detecting the boundary between the sidewalk and the street." Surface applied or retro-fit ADA pads are designed for mounting on dry concrete. These dome pads are bonded to the concrete with industrial strength adhesive and anchoring hardware. ADA Sign Depot includes both, adhesive and anchor bolt hardware, with every pad you buy. If not for the development of ADA compliant surface applied dome pads, also called "dry set" pads, property owners would need to demolish and remove dry concrete, then pour fresh concrete and use cast-in-place truncated dome pads to being their property into compliance. Detectable Warnings incorporating truncated domes are the only option to make hazardous vehicular ways, curb ramps and transit platform edges truly detectable and ADA compliant.

California Title 24 requires that "If a walk crosses or adjoins a vehicular way, and the walking surfaces are not separated by curbs, railings or other elements between the pedestrian areas and vehicular areas, the boundary between the areas shall be defined by a continuous detectable warning which is 36 inches (914 mm) wide." It must be safety yellow.